ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Allowance for credit loss	$ (7,313)	$ (7,676)
Shareholders' equity	93,452	98,215	$ 103,205	$ 114,423
Retained earnings
Financing Receivable, Allowance for Credit Loss [Line Items]
Shareholders' equity	$ (309,290)	(303,025)	$ (273,938)	$ (262,430)
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Payment terms	30 days
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Payment terms	60 days
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss		757
Shareholders' equity		348
Cumulative Effect, Period of Adoption, Adjustment | Retained earnings
Financing Receivable, Allowance for Credit Loss [Line Items]
Shareholders' equity		348
Cumulative Effect, Period of Adoption, Adjustment | Nonperforming
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for nonperforming finance receivables		$ 400